Which of the following describes safe handling of a firearm?

The correct choice emphasizes the importance of unloading and casing the firearm before transportation as a critical safety practice. This measure minimizes the risk of accidental discharge during transport, which can occur if a firearm is improperly handled or if someone inadvertently pulls the trigger. By ensuring that the firearm is unloaded, you eliminate the possibility of an unintentional firing. Casing the firearm further protects it from mechanical damage and helps prevent unauthorized access during transport.

In contrast, the other options present unsafe practices that could lead to serious accidents or legal issues. Keeping the firearm loaded while transporting poses a significant risk, as it raises the chances of an accidental discharge. Storing the firearm in the open compromises its security and increases the likelihood of it being accessed by unauthorized persons. Carrying a firearm without a case also exposes it to potential damage while making it more visible, which could instigate unnecessary alarm or attract unwanted attention. Thus, choice A encapsulates fundamental firearm safety principles essential for responsible gun ownership.